CNIT 242 CORRECT TEST PAPER QUESTIONS AND
ANSWERS SET A+
✔✔Software RAID - ✔✔A RAID system that is controlled by software running within the
operating system.
✔✔RAID 0 (striping) - ✔✔• Data is distributed across multiple disks
• Increased performance
• No redundancy
- If one disk fails, all data is lost
✔✔RAID 1 (Mirroring) - ✔✔• Data is duplicated across multiple disks
• No increased performance
• Fault tolerant
- If a drive fails, the copy can be used
✔✔RAID 5 (Striped with parity) - ✔✔• Data is striped across multiple disks
• Parity data is kept for each set of stripes
• Increased performance
• Provides some redundancy
✔✔RAID 10 or 1+0 (Mirrored Stripes) - ✔✔• Stripes data across multiple disks, which
are then mirrored
• Increased performance
• Fault tolerant
✔✔Network Attached Storage (NAS) - ✔✔File level storage that is available over the
network
✔✔Storage Area Networks (SAN) - ✔✔Block level storage accessible over a network
✔✔SAN vs NAS - ✔✔SAN is designed for datacenter-class applications and NAS is
used for more file server applications
, ✔✔iSCSI - ✔✔is an OSI Session layer protocol
✔✔Initiator - ✔✔Device that originates a session to a storage device
✔✔Target - ✔✔The storage device to which an initiator connects
✔✔LUN (Logic Unit Number) - ✔✔A Logical drive/partition presented over the network
✔✔The network storage devices must be enumerated before they can be accessed -
✔✔A list of available targets and their names are created
✔✔iSCSI Security Logon - ✔✔An initiator associates with a target
✔✔iSCSI Security Authentication is... - ✔✔Optional
✔✔iSCSI Security Authorization is... - ✔✔Mandatory, but can be wildcarded
✔✔iSCSI Security Encryption is... - ✔✔Optional
✔✔Backup - ✔✔Making copies of data that can be used to
restore in the event of a data loss event
✔✔Why Backup? - ✔✔- Data is valuable
- Storage is the only moving parts (except
fans) in most computing hardware
- Mass storage has the smallest MTBF of any
system component
- Data retention laws, requests from criminal
or civil investigations
- Your job depends on it
✔✔What to Backup? - ✔✔- Daily backups should back up any data files
that have changed throughout the day
- Changed files are marked by the OS using an
Archive attribute bit
✔✔When to Backup? - ✔✔-The backup cycle determines when to backup.
-Backups are usually completed once a day.
✔✔Types of backups - ✔✔Full, Differential, and Incremental
✔✔Full Backups - ✔✔Back up all files every time
ANSWERS SET A+
✔✔Software RAID - ✔✔A RAID system that is controlled by software running within the
operating system.
✔✔RAID 0 (striping) - ✔✔• Data is distributed across multiple disks
• Increased performance
• No redundancy
- If one disk fails, all data is lost
✔✔RAID 1 (Mirroring) - ✔✔• Data is duplicated across multiple disks
• No increased performance
• Fault tolerant
- If a drive fails, the copy can be used
✔✔RAID 5 (Striped with parity) - ✔✔• Data is striped across multiple disks
• Parity data is kept for each set of stripes
• Increased performance
• Provides some redundancy
✔✔RAID 10 or 1+0 (Mirrored Stripes) - ✔✔• Stripes data across multiple disks, which
are then mirrored
• Increased performance
• Fault tolerant
✔✔Network Attached Storage (NAS) - ✔✔File level storage that is available over the
network
✔✔Storage Area Networks (SAN) - ✔✔Block level storage accessible over a network
✔✔SAN vs NAS - ✔✔SAN is designed for datacenter-class applications and NAS is
used for more file server applications
, ✔✔iSCSI - ✔✔is an OSI Session layer protocol
✔✔Initiator - ✔✔Device that originates a session to a storage device
✔✔Target - ✔✔The storage device to which an initiator connects
✔✔LUN (Logic Unit Number) - ✔✔A Logical drive/partition presented over the network
✔✔The network storage devices must be enumerated before they can be accessed -
✔✔A list of available targets and their names are created
✔✔iSCSI Security Logon - ✔✔An initiator associates with a target
✔✔iSCSI Security Authentication is... - ✔✔Optional
✔✔iSCSI Security Authorization is... - ✔✔Mandatory, but can be wildcarded
✔✔iSCSI Security Encryption is... - ✔✔Optional
✔✔Backup - ✔✔Making copies of data that can be used to
restore in the event of a data loss event
✔✔Why Backup? - ✔✔- Data is valuable
- Storage is the only moving parts (except
fans) in most computing hardware
- Mass storage has the smallest MTBF of any
system component
- Data retention laws, requests from criminal
or civil investigations
- Your job depends on it
✔✔What to Backup? - ✔✔- Daily backups should back up any data files
that have changed throughout the day
- Changed files are marked by the OS using an
Archive attribute bit
✔✔When to Backup? - ✔✔-The backup cycle determines when to backup.
-Backups are usually completed once a day.
✔✔Types of backups - ✔✔Full, Differential, and Incremental
✔✔Full Backups - ✔✔Back up all files every time
